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Finding the Fourth Proportional to 640,439.11, 883,808.63 and 350,056.45

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Solution

The fourth proportional to 640,439.11, 883,808.63 and 350,056.45 is: 483,079.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,439.11 : 883,808.63 = 350,056.45 : x
  2. Step 2: Convert to fraction form
    640,439.11/883,808.63 = 350,056.45/x
  3. Step 3: Cross multiply
    640,439.11x = 883,808.63 × 350,056.45
  4. Step 4: Simplify right side
    640,439.11x = 309,382,911,497.16
  5. Step 5: Solve for x
    x = 309,382,911,497.16/640,439.11
  6. Step 6: Final answer
    x = 483,079.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.